[EDIT] CategoryのCRUD機能を追加しました。

src/main/java/com/example/demo/app/domain/service/CategoryService.java

@@ -13,4 +13,12 @@ public interface CategoryService {
 	public CategoryModel findOneByCategoryName(String categoryName);
 	
 	public CategoryModel findByTransactionId(Long transactionId);
+	
+	public List<CategoryModel> findAllByuserId(Long userId);
+	
+	public void delete(Long categoryId);
+	
+	public CategoryModel save(CategoryModel categoryModel, Long userId);
+	
+	public List<CategoryModel> findAllExceptCustom();
 }

src/main/java/com/example/demo/app/domain/service/impl/CategoryServiceImpl.java

@@ -9,6 +9,7 @@ import com.example.demo.app.domain.model.CategoryModel;
 import com.example.demo.app.domain.service.CategoryService;
 import com.example.demo.app.infra.entity.CategoryEntity;
 import com.example.demo.app.infra.repository.CategoryRepository;
+import com.example.demo.app.infra.repository.UserRepository;
 
 import lombok.RequiredArgsConstructor;
 
@@ -17,6 +18,7 @@ import lombok.RequiredArgsConstructor;
 public class CategoryServiceImpl implements CategoryService {
 
 	private final CategoryRepository categoryRepository;
+	private final UserRepository userRepository;
 
 	public List<CategoryModel> findAll() {
 
@@ -52,5 +54,29 @@ public class CategoryServiceImpl implements CategoryService {
 		return CategoryModel.convertFrom(categoryRepository.findByTransactionId(transactionId));
 	}
 
+	public List<CategoryModel> findAllByuserId(Long userId) {
+
+		return CategoryModel.convertFrom(categoryRepository.findByUserId(userId));
+
+	}
+
+	public void delete(Long categoryId) {
+
+		categoryRepository.deleteById(categoryId);
+
+	}
+
+	public CategoryModel save(CategoryModel categoryModel, Long userId) {
+
+		return CategoryModel.convertFrom(
+				categoryRepository.save(CategoryModel.convertTo(categoryModel, userRepository.findById(userId).get())));
+
+	}
+
+	public List<CategoryModel> findAllExceptCustom() {
+
+		return CategoryModel.convertFrom(categoryRepository.findAllExceptCustom());
+
+	}
 
 }

src/main/java/com/example/demo/app/infra/repository/CategoryRepository.java

@@ -1,5 +1,7 @@
 package com.example.demo.app.infra.repository;
 
+import java.util.List;
+
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.query.Param;
@@ -15,4 +17,10 @@ public interface CategoryRepository extends JpaRepository<CategoryEntity, Long>
 	@Query("select c from CategoryEntity c inner join TransactionEntity t on c.categoryId = t.categoryEntity.categoryId where t.transactionId = :transactionId")
 	public CategoryEntity findByTransactionId(Long transactionId);
 	
+	@Query("select c from CategoryEntity c where c.userEntity.userId = :userId")
+	public List<CategoryEntity> findByUserId(Long userId);
+	
+	@Query("select c from CategoryEntity c where c.userEntity.userId is null")
+	public List<CategoryEntity> findAllExceptCustom();
+	
 }

src/main/java/com/example/demo/app/presentation/controller/CategoryController.java

@@ -0,0 +1,87 @@
+package com.example.demo.app.presentation.controller;
+
+import java.util.List;
+
+import jakarta.servlet.http.HttpSession;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PostMapping;
+
+import com.example.demo.app.domain.model.LoginModel;
+import com.example.demo.app.domain.service.CategoryService;
+import com.example.demo.app.presentation.form.CategoryForm;
+
+import lombok.RequiredArgsConstructor;
+
+@Controller
+@RequiredArgsConstructor
+public class CategoryController {
+
+	private final CategoryService categoryService;
+	
+	
+	@GetMapping("/category/list")
+	public String categoryListGet(Model model, HttpSession session) {
+		
+		LoginModel loginUser = (LoginModel) session.getAttribute("loginUser");
+		
+		List<CategoryForm> categoryFormList = CategoryForm.convertFrom(categoryService.findAllByuserId(loginUser.getUserId()));
+		
+		model.addAttribute("categoryFormList", categoryFormList);
+		
+		return "category-list";
+	}
+	
+	@GetMapping("/category/create")
+	public String categoryCreateGet(@ModelAttribute CategoryForm categoryForm) {
+		
+		return "category-create";
+	}
+	
+	@PostMapping("/category/create")
+	public String categoryCreatePost(@ModelAttribute CategoryForm categoryForm, HttpSession session) {
+		
+		LoginModel loginUser = (LoginModel) session.getAttribute("loginUser");
+		
+		
+		categoryService.save(CategoryForm.convertTo(categoryForm), loginUser.getUserId());
+		
+		return "redirect:/category/list";
+	}
+	
+	@GetMapping("/category/update")
+	public String categoryUpdateGet(Model model, Long categoryId) {
+		
+		CategoryForm categoryForm = CategoryForm.convertFrom(categoryService.findOne(categoryId));
+		
+		model.addAttribute("categoryId", categoryId);
+		model.addAttribute("categoryForm", categoryForm);
+		
+		return "category-update";
+	}
+	
+	@PostMapping("/category/update")
+	public String categoryUpdatePost(@ModelAttribute CategoryForm categoryForm, HttpSession session, Long categoryId) {
+		
+		LoginModel loginUser = (LoginModel) session.getAttribute("loginUser");
+		
+		categoryForm.setCategoryId(categoryId);
+		
+		categoryService.save(CategoryForm.convertTo(categoryForm), loginUser.getUserId());
+		
+		return "redirect:/category/list";
+	}
+	
+	@PostMapping("/category/delete")
+	public String categoryDeletePost(Long categoryId) {
+		
+		categoryService.delete(categoryId);
+		
+		return "redirect:/category/list";
+	}
+	
+	
+}